Water-tube boiler.



.1; E. BELL 'WAT ER TUBE BOILER. APPLICATION Fl-LED DEC- 26, I905- 1,141,520, Patented June 1, 1915. 4 SHEETS-SHEET l- 0 A 0i 3 3 E J k n 2 9 0 0 0 0 0 0 M 0 M & 2 0 0 0 0 0 0 0 0 3 v T 00000000 00 0 0 0 O m w w o 0 0 0 0 0 0 0 0 0 u m l w w m w W w l v 0 0 0 o 0 0 0 v N o 0 0 0 0 0 0 0 o 0 0 0 0 o 0 0 0%0 0 0 0 0 0 0 0 0 0 0 u 0 0 0 0 0 0 0 0 0 0 0 0 u LJ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 u 0 0 0 0 0 0 0 0 0 8 0 0 0 0 0 0 u v 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 u 00.. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 u 9 2 0 0 0 0 0 0 0 0 0 0 0 0. 20 2 I .0 7 0 0 0 0 0 0 0 01 0 0 0 0 0 2 9f 0 owowowow owowowom w w w w w Q 1 u we we wwwmww w w 0 0 0 0 0 0 0 0 0 o u womowowo M0 0 o 0 m w m w w I 0000 0 0 0 0 00000 n 8 0000 0000 00000 n 0 0 0 0 0 0 0 0 [L w w w m 0 u 0 0 0 0 0 0 0 0 0 0 0 0 0 u 0 0 0 0 0 0 0 0 I wo owo om 0 u 0 0 0 0 0 0 0 0 0 u Wu 8 8 E 8 S 3 E 0 8 0. 0 q 3 E ..m. N I u W J. E. BELL.

WATER TUBE BOILER. APPL1CAT|0N FILED 050.26, 1905.

Patented June 1, 1915.

4'SHEETSSHEET 2.

E i PSI HHHIIHHHIIHHIIIIHHH .Hmm 9 2 WITNESSES J. E. BELL.

WATER TUBE BOILER.

APPLICATION FILED DEC.26, 1905. 1,141,520. Patented June 1, 1915.

4 SHEETSSHEET 3.

, wrmmsszs 1" E I 11 11121111012 J. E. BELL.

WATER TUBE BOILER.

APPLICATION FILED DEC. 26, 1905.

RU. 1 9 a a L @H 1 H z w 1 m 8 L 1 N W 1 u 4 L 2H 2 e W 5 L/ 1 L) fl x 7 KW m m 4 o T J m y I M u m 4 t S 2 n 4 l w m 1 j n, feninon nnw 201m, n. 2;, ns'smnon 'ro 'rnn-BABcocK a WILCOX COMPANY,

or new YORK, N. Y., A CORPORATION OF'NEW JERSEY.

WATER-TUBE BOILER;-

speciflcatibn of Letters Patent;

'npplication filed December 26, 1905. Serial No. 293,170.

1 To (ill-whom itmay concern:

' Be it known that I, JOHN E. BELL, of New York, county and State of New -York, have invented a new and-useful Improvement in .Water-Tuhe- Boilers, of which the follow ing is a full, clear, and exact description,

reference being had to the accompanying drawings, forming part of this specification,

Flgure 1 is a front'view of a battery of boilers embodying my invention, one boiler being shown in end elevation and the other inverticalsection; Fig. 2 is a longitudinal .vert ],ect;i0n; and Fi s. 3 and l are views 'similarg juFig-r 2, but,s owing other forms of the invention. I A

invention relates to water tube boilers, and'mone particularly to those of the horizontaltypm wherein the tubes extend in a general horizontal direction, usually between. the horizontal plane and degrees thereto. Qwing. to the restriction ,of flow through the tubes and headers, it has been necessary to limit the height of the'boiler and. the amount'of the heating surface, for the reasonthat if the height of the boiler is increased beyond certain limits, the flow isrestricted to such an extent as to endanger the lower tubes, '7

In my pending application, Serial No. 286,184gfiled November 7, 1905, I have de- .}s'cribedand claimed broadly means for overr coming these difliculties, consisting in providing the'lower set of tubes with a direct connection at one or both ends to an upper steam and water space or drum, and connecting the' upper set or sets of tubes to a water space or drum, independently of the \CODHBOUOI). for the lower set, whereby a rapid circulation is provided through the lower tubes which are nearest the 'furnace, and most liable to be burned out. This arrangement also provides for a very large increase in the height of the boiler, since a number of sets of 'tubes, -,may, by means of the independent connections to the water spaces or chambers be superimposed one.

above another.

Qne object of my present invention is to simplify and improve the manner of connecting the lower tubes with the upper steam and water'space, and to thereby provide for more convenient access to the upper tubes. To this end the headers of the lower tubes are directly connected at one or both ends with an intermediate or subdrum or chamber, which in turn has a single connection with each of the upper steam Patented June 1, 1915. v

and water chambers 01" drums, these single connections being so arranged as not to in terfere with free access to the upper tubes.

A further object of my invention is to provide for the use of super-heaters in this type of boiler, so arran ed that the volume ofhot gases from the full contact therewith after first passin r'nace will come in over a number of water tubes. To this on ,n

I arrange the superheater between the water tubes, preferably in the first ,pass of. the

gases, such superheater occupying less space;

the headers 3 and 4 which may be of any usual or ordinary form. The headers 3 are directly connected, by means of short nipples or connections 5, with a sub-drum or chamber 6 which extends transversely "of the boiler, ,and has a single separate connection 7 with each of the steamand water drums 8, 9 and 10. These drums 8, 9 and were shown as extending longitudinally of the boiler,-but they may however, extend trans-' versely of the boiler and be located above either-endgflof-it. In Fi s. 1, 2 and 3, the drum 6 and--connections are shown as being at the upper ends of the tubes. '11 and 12 designate two upper sets of tubes which are shown asbeing parallel to the lower tubes, the tubes 11 being connected to the headers 11, and the tubes 12to the headers 12*. The headers 11 at the rear end are connected to the header 4 by the vertical tubes or nipples 13; the rear headers 11f and 12 are connected by 'the'nipples 14;

and the rear headersl2 are connected to shorter than the tubes 2, and-the vertical connections 7 are placed in the space at the rear of the tubes 11 and 12. I'have shown two sets of grates 18 and 19 extending 'from the front and rear walls 20'-'and 21 to a bridge wall 22 arran ed transversely at an intermediate point. ire doors 23 are provided at both ends of the setting, the grates extending underneath substantially the whole of the boiler. The fire doors may, however, be placed at one or both ends of the setting. and the grates may extend beneath any desired portion or portions of the heating surface.

The bafliing may be of any desirable type. In the form shown in Figs. 1, 2, 3 and 4, I have shown the lower horizontally extend ing-arch or baflie 24 below thelowerrow,

of water. tubes, and two vertically extending series of baflles 25 and 26 arranged toform three up and down passes of the gas.

'Thebafiiez25 has the jog or oif-set 27 which serves to-contract the upper portion of-the :first-pass and the lower portion of the sec ondpass, such jog 'or off-set being between the two uppersetsof tubes. This proportions the gas passages to the tern erature and volume of the gases which contract as they cool, and is adesirable, although not a necessary featureof the invention. The space between the vertical connections 7 is sufficiently large to permit easy access to the rear headers 11v and 12.

In the operation of the boiler, thewater I andsteam in the lower tubes flows into the headers 3 and thence into the intermediate orsub-drum 6, and from such drum to the main steam and water drums, where. the

steam is released." In this manner, a rapid circulation is provided in the lower set of .tubes, such circulation be ng independent of that through the upper tubes.

separate connections are not employed at and .12. :In the form shown in Fig. 3', how- This drumrfi is connectedto the header .11;

of the tubes 11by nipples 11", and is provided with a supply connection or connections 6 to the main steam and water drums' Fig.- 2.

In the form shown in Figs. 1, 2 and 3,

The arrangement is otherwise the same as that first described, except that I have shown a slightlydifferent arrangementof grates 18 and 19, these grates being set at a greater angle.' p -m As the upper sets of tubes are subject to the action of the .furnace gases, after they have parted with a portion of their heat, I

can stack the rows oftubes of these upper sets above each other, to any desired height, Within practical limits, without danger of burning out the lower tubes.

28 designates a superheater which. Is

shown as interposed between the. tubes 2' and the-tubes 11. This superheater is shown as being of the U-tube form, but Iv mayemploy-a superheaterof any suitable type. In the form shown in'Figs. 1, 2,'and: 3, this sup'erh'eaten is locatedatthe-front end of the boiler with the tubes extending at right angles to the water tubes, and in the first pass of the gases..-

29 indicates the inlet'or supplyeonnecseveral 8, I and, -1Q,as shown in 30 is superheater. I

the mi h w iiiii Fig.4, the super heater '28. is shown as being located Jbe-' tween the lower tubes 2 and the tubes: 11 .at

the rear end ofthe'fHrnaceS InfthisIorm,"

tions for the superheater 6 connected to the the. outlet .pipe lconnectionl for" the the ba'flling. consists of alowerlbaflleor arch 31, two vertical seriesjof 32 and .33, and a horizontallly arranged balfle32' ex tending from the 'front wall of the furnace to the bottom of the baflle 32; The vertical bafiles 32 andare not, however,directly vertical, but the two series of baflles are he clined toward each other at theirlower ends, so that there is provided'a contraction of the gasipassages in the ,direction of the flowbf thegases'by means of which the same result-isobtained asin the construcrangementof bathing shown this form,

the first pass of'the, gases .i's'along the whole length of the lowerjtubes 2, thence up g,

wardly over the .superheater and the rear 1 end portions oi the .tubes 11 and 12, thence downwardlybetween the bafliesv 32 and 33,

and thence vupwardly at theiront of the l boiler. Thefsuperheater tubes in 7 this. form [are shown asfe'xtending parallel 'witli'the water tubes, the inlet, connections being .shownat 34 and the outletconnection at 35.- the rear end ofthe boiler for the tubes 2, 11 I- In this form the intermediate-drum 6,is

versely inclined. The furnace may be fired mama;

water drum The upperlsets of tubes, in-

stead of being parallel with the 1ower ones,-

may be inclined atadiiferent angle, or refrom one or both ends, and the grate may extend below any part or all of the boiler,

- or drum, at one or,both ends of the boiler,-

whereby the number of connections to the of the boiler.

and many othervariations'niay be made in the. form and arrangement of the boiler, ipes and conneet'ion's without departing from my invention. a

.The advantages of my invention result from the useof the intermediate chamber upper drums is reduced, and access to the upper tubes is. provided;.also from the location and arrangement of the superheater between the tubes in a manner to be readily accessible, and occupying aminimum of space, thereby increasing the compactness By placing the su erheater at-a-higher or lower point in the oiler, or

by changing the arrangement of the baflles, the degree of superheating may be varled.

I claim v 1. In a steam boiler, the combination with upper and lower banks of substantially longitudinally disposed tubes, a steam andwater, said banks being provided with separate connections for conducting the steam generated therein directly to the steam and water drum, means for causing the products of combustion to make serial passes transversely over said tubes, and a superheater located between the banks.

2. In a steam boiler, the combination with upper and lower banks or substantially- I longitudinally dis osed tubes, a steam and water drum, sai

banks being provided with separate connections for conducting the steam generated therein directly to the steam and water drum, substantially verti'cal baflies extending transversely of the tubes for causing the products of combustion to have an-upward and downward passage across the tubes, and a superheater located in the up-passage of the ases.

3. In ahorizontal water tube boiler, the combination with an upper set of substantially vertical end headers or boxes, of a plurality of inclined water tubes connecting the same, a lower set of substantially vertical end headers'or boxes, one of the same being disposed in vertical alinement with the corresponding upper header, the other being arranged in a different plane the corresponding upper.

' header, inclined water tubes connecting the lower headers, asubstantially horizontal steam and water chamber located aboveboth sets or headers,. an'intermediate or sub-.-

drum located between the; upper and lower 'headers that are in vertical alinement and connected to both, a sub-drum located over-,- the' lower headerj that is out of vertical V alinement with the upper'header and conacross the tubes having an upper restricted portion, and a downward transverse pass across the tubes communicating with the upward pass and having a restricted lower 4 portion.

6. In a steam boiler, the combination with longitudinallv disposed upper and lower banks of tubes, of a transverse upward pass for the products of combustion, across the V tubes having an upper restricted portion, a

downward transverse pass across the tubes communicating with the upward pass and having a restriced lower portion, and a superheater located in the lower larger portion of the upward pass.

, 7. In a horizontal water tube boiler, the combination with upper and lower banks of water tubes, of a furnace located below the same, transversely disposed baflies to 1 cause the products of combustion to fiow upwardly across the tubes, and a superthe combination w1th lonfitudmally disposed upper and. s of tubes, eta-transverse pass heater arranged in one of the passes formed by the bafiles, said pass being constricted above the furnace.

8. In a horizontal water tube boiler, the combination with, upper and lower sets of water tubes spaced apart, of a-furnace located below the set of tubes, a bafile exto produce a pass across the same, and a superheater arranged in the pass between the sets of tubes, said pass being constricted above the tubes.-

9. In a horizontal water tube boiler, the combination with a substantially horizontal set of water tubes, of a furnace located below the same, oppositely extending transverjsely disposed baflles arranged across the tubes and producing up and down passes,

one of said baflies having an offset to produce a constriction in thefirst pass and also in the second pass, and a superheater arranged in the first pass and above the furnace.

10. In a steam boiler, the combination with a lower bank of tubes, of an upper bank of tubes shorter than the same, upper. and lower headers for the banks, the upper m tending transversely of both sets of tubes header at one end being out "of ali exhent with the lower header at the same end -a upwardly extending bafile across both'banks in spaced relation to the said eflset headers,

5 and a superheater in the pass' formed be.-

one end 1 I -Witnesses: tween the bafiie and the set 9f headers at my hand I E. v. Bum, 'N; .S. Sum.

In testimb iy whereef, I have hereunte set f' -JOHN E.-BELL. 

